Broadening of the DEM by multi-shelled and turbulent loops

Understand

Broad differential emission measure (DEM) distributions in the corona are a sign of multi-thermal plasma along the line-of-sight.

• Traditionally, this is interpreted as evidence of multi-stranded loops.
• Recently, however, it has been shown that multi-stranded loops are unlikely to exist in the solar corona, because of their instability to transverse perturbations.
• We aim to test if loop models subject to the Transverse Wave-Induced Kelvin-Helmholtz (TWIKH) instability result in broad DEMs, potentially explaining the observations.